Ford P1820 OBD-II Trouble Code Definition:
P1820 Internal Mode Switch Circuit A Low
P1820 Ford OBD-II Trouble CodeDescription:
OBD Trouble Code P1820
Internal Mode Switch Circuit A Low
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PSA OBD Trouble Code P1820
Transmission transfer case clockwise shift relay coil circuit failure
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VAG OBD Trouble Code P1820
Pressure Contr.Solenoid 2 Short to B+
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